On July 7, 2015 Adventure Time was renewed for an eighth season according to The Hollywood Reporter.[1] Storyline writing for season eight began on August 10, 2015.[2] On September 8, 2015, storyboarding began according to Sam Alden.[3] During the season, the miniseries Islands aired at the end of January and the beginning of February 2017.[4] It was first hinted before Stakes aired, when head story writer Kent Osborne revealed that the show would likely produce several more miniseries.[5]
After the reshuffling of the previous season, March 26, 2016, when the episode "Broke His Crown" first aired, marks the premiere of season 8.[6] The season ended with the episode "The Light Cloud" as the season finale;[7] which is also the last episode of the miniseries Islands.
| No. overall | No. in season | Title card | Title | Viewers (in millions) |
Prod. code | Airdate |
| 226 | 1 | 
|
"Broke His Crown" | 1.13 | 1034-234 | March 26, 2016 |
| When Ice King's magic crown goes haywire, Marceline and Princess Bubblegum resort to extreme measures to help him. | ||||||
| 227 | 2 | 
|
"Don't Look" | 1.13 | 1034-230 | April 2, 2016 |
| Finn unearths a treasure with a terrible price at the top of Dead Mountain. | ||||||
| 228 | 3 | 
|
"Beyond the Grotto" | 1.06 | 1034-235 | April 9, 2016 |
| Finn and Jake follow their Sea Lard into the pond in front of their home, and in doing so, are led to a strange new world. | ||||||
| 229 | 4 | 
|
"Lady Rainicorn of the Crystal Dimension" | 0.90 | 1034-232 | April 16, 2016 |
| Jake's son finds a hidden box and draws attention from a Rainicorn. | ||||||
| 230 | 5 | 
|
"I Am a Sword" | 0.91 | 1034-236 | April 23, 2016 |
| Finn starts having guilt nightmares about his missing Finn Sword...but are the nightmares real? | ||||||
| 231 | 6 | 
|
"Bun Bun" | 1.01 | 1034-240 | May 5, 2016 |
| Finn brings a special delivery for Cinnamon Bun to the Fire Kingdom, but it may come with a dangerous cost. | ||||||
| 232 | 7 | 
|
"Normal Man" | 1.38 | 1034-241 | May 12, 2016 |
| Normal Man asks for Finn and Jake's help to rescue his brother. | ||||||
| 233 | 8 | 
|
"Elemental" | 1.17 | 1034-242 | May 19, 2016 |
| Ice King digs up an item buried underneath the Ice Kingdom. | ||||||
| 234 | 9 | 
|
"Five Short Tables" | 1.36 | 1034-237 | May 26, 2016 |
| Fionna and Cake go on a cooking adventure to take Cake's art to a new level. | ||||||
| 235 | 10 | 
|
"The Music Hole" | 1.15[8] | 1034-239 | June 23, 2016 |
| Finn hears a mysterious song while judging a Battle of the Bands. | ||||||
| 236 | 11 | 
|
"Daddy-Daughter Card Wars" | 1.16[9] | 1034-238 | July 7, 2016 |
| Jake needs his daughter's help in an underground Card Wars tourney to move on from his embarrassing past. | ||||||
| 237 | 12 | 
|
"Preboot" | 0.77[10] | 1042-243 | November 19, 2016[11] |
| During an excavation of human artifacts, Finn, Jake, and Susan are greeted by a mysterious new stranger who may hold the key to the past.[11] | ||||||
| 238 | 13 | 
|
"Reboot" | 0.77[10] | 1042-244 | November 19, 2016[11] |
| Finn and Jake take on one of the fiercest enemies they've faced when a powerful ally goes rogue.[11] | ||||||
| 239 | 14 | 
|
"Two Swords" | 0.88[12] | 1042-248 | January 23, 2017[13] |
| Finn and Jake contend with a mysterious, but familiar, new being.[13] | ||||||
| 240 | 15 | 
|
"Do No Harm" | 0.88[12] | 1042-249 | January 23, 2017[13] |
| Finn makes amends at the Candy Hospital while Jake tries to connect with their unexpected houseguest.[13] | ||||||
| 241 | 16 | 
|
"Wheels" | 0.91[14] | 1042-245 | January 24, 2017[13] |
| Kim Kil Whan is worried about his daughter’s future and asks Jake for some parental advice.[13] | ||||||
| 242 | 17 | 
|
"High Strangeness" | 0.95[15] | 1042-246 | January 25, 2017[13] |
| An otherworldly encounter puts Tree Trunks on the trail of a conspiracy in the Candy Kingdom. [13] | ||||||
| 243 | 18 | 
|
"Horse and Ball" | 0.76[16] | 1042-247 | January 26, 2017[13] |
| When disaster befalls James Baxter, it’s up to Finn and Jake to help him pick up the pieces.[13] | ||||||
| 244 | 19 | 
|
"Jelly Beans Have Power" | 0.91[17] | 1042-250 | January 27, 2017[13] |
| Princess Bubblegum’s scientific mind must wrestle with her Elemental magic potential when she and her kingdom are faced with a Crystal Entity.[13] | ||||||
| 245 | 20 | 
|
"The Invitation" | 1.20[18] | 1042-251 | January 30, 2017[13] |
| A mysterious craft invades Ooo and Finn believes it may hold the secrets to his past.[13] | ||||||
| 246 | 21 | 
|
"Whipple the Happy Dragon" | 1.20[18] | 1042-252 | January 30, 2017[13] |
| Finn, Jake, and Susan set sail on a ocean voyage full of wonders and danger.[13] | ||||||
| 247 | 22 | 
|
"Mysterious Island" | 1.09[19] | 1042-253 | January 31, 2017[13] |
| After waking up alone and shipwrecked, Finn investigates a bizarre island in search of his friends.[13] | ||||||
| 248 | 23 | 
|
"Imaginary Resources" | 1.09[19] | 1042-254 | January 31, 2017[13] |
| Finn and Jake travel to a land where reality has been redesigned and improved.[13] | ||||||
| 249 | 24 | 
|
"Hide and Seek" | 1.01[20] | 1042-255 | February 1, 2017[13] |
| While exploring some futuristic ruins, Susan sees glimpses of a familiar girl.[13] | ||||||
| 250 | 25 | 
|
"Min and Marty" | 1.01[20] | 1042-256 | February 1, 2017[13] |
| An unexpected revelation from Susan leads Finn closer to answers about his past.[13] | ||||||
| 251 | 26 | 
|
"Helpers" | 1.00[21] | 1042-257 | February 2, 2017[13] |
| Finn and his friends journey to a last refuge called Founders Island.[13] | ||||||
| 252 | 27 | 
|
"The Light Cloud" | 1.00[21] | 1042-258 | February 2, 2017[13] |
| Finn confronts the power behind Founders Island, but will he ever return home to Ooo?[13] | ||||||
- ↑ http://www.hollywoodreporter.com/live-feed/adventure-time-regular-show-3-807037
- ↑ https://twitter.com/JackPendarvis/status/630586705976754176
- ↑ http://web.archive.org/web/20160305170019/https://twitter.com/samalden/status/641067300309696512
- ↑ https://web.archive.org/web/20161105224142/https://www.comixology.eu/Adventure-Time-Islands/digital-comic/435825
- ↑ https://web.archive.org/web/20161106061413/http://www.infiniteguest.org/conversation-parade/2015/11/marceline-happy-as-a-clam-or-the-saddest-person-in-all-ooo/
- ↑ http://web.archive.org/web/20170610122657/http://www.cartoonnetwork.com/video/adventuretime/episodes/
- ↑ http://archive.is/20170302152827/http://www.showbuzzdaily.com/articles/showbuzzdailys-top-150-thursday-cable-originals-network-finals-2-2-2017.html
- ↑ http://www.showbuzzdaily.com/articles/showbuzzdailys-top-150-thursday-cable-originals-network-finals-6-23-2016.html
- ↑ http://www.showbuzzdaily.com/articles/showbuzzdailys-top-150-thursday-cable-originals-network-finals-7-7-2016.html
- ↑ 10.0 10.1 http://www.showbuzzdaily.com/articles/showbuzzdailys-top-150-saturday-cable-originals-network-finals-11-19-2016.html
- ↑ 11.0 11.1 11.2 11.3 http://www.animationmagazine.net/home-entertainment/clips-cartoon-networks-premiere-packed-november/
- ↑ 12.0 12.1 http://www.showbuzzdaily.com/articles/showbuzzdailys-top-150-monday-cable-originals-network-finals-1-23-2017.html
- ↑ 13.00 13.01 13.02 13.03 13.04 13.05 13.06 13.07 13.08 13.09 13.10 13.11 13.12 13.13 13.14 13.15 13.16 13.17 13.18 13.19 13.20 13.21 13.22 13.23 13.24 13.25 13.26 13.27 http://devendaman.tumblr.com/post/154769347141/list-of-adventure-time-episodes-premiering-in
- ↑ http://www.showbuzzdaily.com/articles/showbuzzdailys-top-150-tuesday-cable-originals-network-finals-1-24-2017.html
- ↑ http://www.showbuzzdaily.com/articles/showbuzzdailys-top-150-wednesday-cable-originals-network-finals-1-25-2017.html
- ↑ http://www.showbuzzdaily.com/articles/showbuzzdailys-top-150-thursday-cable-originals-network-finals-1-26-2017.html
- ↑ http://www.showbuzzdaily.com/articles/showbuzzdailys-top-150-friday-cable-originals-network-finals-1-27-2017.html
- ↑ 18.0 18.1 http://www.showbuzzdaily.com/articles/showbuzzdailys-top-150-monday-cable-originals-network-finals-1-30-2017.html
- ↑ 19.0 19.1 http://www.showbuzzdaily.com/articles/showbuzzdailys-top-150-tuesday-cable-originals-network-finals-1-31-2017.html
- ↑ 20.0 20.1 http://www.showbuzzdaily.com/articles/showbuzzdailys-top-150-wednesday-cable-originals-network-finals-2-1-2017.html
- ↑ 21.0 21.1 http://www.showbuzzdaily.com/articles/showbuzzdailys-top-150-thursday-cable-originals-network-finals-2-2-2017.html